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Algorithm for evaluating SOC of lithium battery based on voltage

A technology for voltage evaluation and lithium batteries, which is used in measuring electricity, measuring electrical variables, instruments, etc., and can solve problems such as sudden voltage changes, equipment fires and explosions, and wafer scrapping

Active Publication Date: 2021-05-04
苏州泰鼎智能科技有限公司
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Problems solved by technology

[0005]For example: In 2016, the high-voltage substation equipment in Xi’an once caught fire and exploded, and the voltage in the east and south of Xi’an city changed suddenly, which led to the emergency shutdown of Samsung’s memory chip factory in Xi’an. All the upper wafers were scrapped. According to the price of 64-layer NAND chips at that time, Samsung lost as much as 300 million US dollars in that accident. If the energy storage lithium battery was used as a backup power supply at that time, Samsung would not have caused such a large loss.

Method used

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  • Algorithm for evaluating SOC of lithium battery based on voltage
  • Algorithm for evaluating SOC of lithium battery based on voltage
  • Algorithm for evaluating SOC of lithium battery based on voltage

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Embodiment

[0036] Such as Figure 1-5 As shown, an algorithm for evaluating the SOC of a lithium battery based on voltage includes the following steps:

[0037] Step 1: When the ambient temperature is -30°C to 60°C, set the voltage of n cells as U nx , look up the table and the voltage is at U ny and U nz between;

[0038] Step 2: The SOC difference between y and z is 5%, and their corresponding power percentages are SOC ny and SOC nz ;

[0039] Step 3: Through Formula 1 Calculate SOC nx ;

[0040] Step 4: Through Formula 2 Calculate SOC nx ;

[0041] Step 5: When n=3:

[0042] u 3y =11.52V, SOC 3y = 55%;

[0043] u 3z =11.64V, SOC 3z = 60%;

[0044]

[0045] SOC 3x = 57.083%;

[0046] Step six: T x temperature, the voltage is V x , seek SOC x , between T x T between x-1 ,T x+1 Corresponding SOC at temperature x-1 and SOC x+1 and its voltage U x-1 , U x+1 Find the voltage of 100%, 75%, 50%, 25%, 0%, and then calculate the accurate SOC according to the f...

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Abstract

The invention discloses an algorithm for evaluating the SOC of a lithium battery based on voltage. The voltage of n batteries is set as Unx when the environment temperature is -30 DEG C to 60 DEG C, a table that the voltage is between Uny and Unz is looked up, the SOC difference between y and z is 5%, and the corresponding electric quantity percentages are SOCny and SOCnz; and SOCnx is calculated through a formula I. The algorithm has the beneficial effects that algorithm evaluation is carried out based on the electric quantity SOC in the lithium battery BMS of a sweeping robot, so that the sweeping robot can be normally used and work within a reasonable electric quantity range, the service life of the lithium battery is ensured, and unnecessary life and property loss is avoided.

Description

technical field [0001] The invention relates to the technical field related to lithium batteries, in particular to an algorithm for evaluating the SOC of lithium batteries based on voltage. Background technique [0002] In the past hundreds of years, the continuous use of non-renewable energy has caused serious pollution of the atmosphere and water. At the same time, with the occurrence of extreme climate, all of these require us to find an environmentally friendly and non-polluting renewable energy source. [0003] Transportation, artificial intelligence, communication industry and high-tech industry are developing rapidly, and electric energy is indispensable in these industries, and lithium battery has become a good container for storing electric energy, but how to make lithium battery and gasoline, diesel In that way, it can be seen at a glance that the SOC has become a very difficult problem. How to know the SOC of lithium batteries is very important to the transportat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/378
CPCG01R31/367G01R31/378Y02E60/10
Inventor 李钱欢甘小鹏于利银
Owner 苏州泰鼎智能科技有限公司
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